I mean a fully fledged regular debian

https://www.linuxjournal.com/content/bringing-desktop-linux-...

https://source.android.com/docs/whatsnew/android-16-release#...

While this is mostly a KVM setup, there's nothing specific about Android that prevents a linux userspace from running in there. Each app is almost one already. Most of its core components have been integrated into linux's main repository (like binder), and AOSP isn't that far off from a regular Linux. Sure, zygote, user & power management are not exactly a standard install, but they're not that crazy either